hi.
ive re3cently passed my ccn cen1 so fairly new to the industry. just a question regarding modulation. have i got this right---
gas valve modualtes in this order of sequence ntc (working ok)transmits corrosponding voltages via pcb to gas galve to modulate to the required demand?
if no modualtion is taking place or poor performance what will be the affect on ch and dhw demand- overheating? poor temp performance?
i assume if you suspect modualtion is the problem you would first do all the basic gas pressure tests, check to see if the modureg is correctly set up to mini and maximum settings,resistence and supply voltages.then in then fault find ing prcocess you would begin to look at defective thermistors , pcb not transmitting correct dc volatage to modureg etc?
any help would be great. thanks
ive re3cently passed my ccn cen1 so fairly new to the industry. just a question regarding modulation. have i got this right---
gas valve modualtes in this order of sequence ntc (working ok)transmits corrosponding voltages via pcb to gas galve to modulate to the required demand?
if no modualtion is taking place or poor performance what will be the affect on ch and dhw demand- overheating? poor temp performance?
i assume if you suspect modualtion is the problem you would first do all the basic gas pressure tests, check to see if the modureg is correctly set up to mini and maximum settings,resistence and supply voltages.then in then fault find ing prcocess you would begin to look at defective thermistors , pcb not transmitting correct dc volatage to modureg etc?
any help would be great. thanks